Originally Posted by rene_galupo
I've tried using the latest Kindlegen_v2.4 to generate the mobi with audio/video included but got this error message when loaded to Kindle apps for iPad "Unable to play audio. There was a problem downloading the audio content of this title. Please remove the book from your device and re-download it."
May not make a difference, but the latest Kindlegen is actually v2.5 now. You may want to try that just to be sure.